In addition, many molecular mechanisms of testosterone on bone metabolism have been currently established by many experimental data." Testosterone also can help patients lose weight, which puts less pressure on bones. Instead of completely losing trabecular bone, men with low testosterone experience trabecular thinning. Since weight-bearing exercises are essential for stimulating bone formation, the lack of physical activity exacerbates bone loss, further weakening the skeleton. Check the Supplement Facts label to determine the amount of calcium in the supplement. Calcium is found in many multivitamin/mineral supplements, in calcium supplements, and in supplements that contain calcium and other nutrients such as vitamin D. Average daily recommended amounts are listed below in milligrams (mg). For more in-depth information, see our health professional fact sheet. Currently, there is a limited amount of data on the effects of different types of hypogonadism on BMD and fracture risk. The differences in BMD between primary hypogonadism and secondary hypogonadism suggest that the type of hypogonadism may affect the overall risk of osteoporosis and fragility fracture. These studies demonstrate decreased BMD in hypogonadal males of all ages, particularly in the lumbar spine 91–100. Additionally, the few subjects that would meet the criteria for hypogonadism likely had late onset hypogonadism related to age-related testosterone decline, which is a distinct entity from primary or secondary hypogonadism in younger males 88–90. For example, in the MrOS study, only men in the lowest testosterone quartile examined would possibly have testosterone levels low enough to meet a clinical diagnosis of hypogonadism. As testosterone levels decline, men may experience decreased muscle function, leading to reduced physical activity. However, a few studies failed to demonstrate its effects, and no evidence supporting the hypothesis that TRT can prevent bone fracture incidence exists. Several recent studies demonstrated the benefit of TRT on BMD, especially in hypogonadal men with osteopenia and osteoporosis. Testosterone plays an important role in maintaining BMD and bone health among men. Three studies targeting hypogonadal men with osteopenia or osteoporosis demonstrated that TRT could significantly increase their BMD 76,78,83. Moreover, testosterone plays some potential roles in maintaining BMD among men, and TRT is expected to be useful for preventing and managing osteoporosis and improving BMD among hypogonadal men. Epidemiological information on male osteoporosis arising from secondary causes, and male hypogonadism, specifically, is lacking, and therefore, the prevalence of male osteoporosis attributed to hypogonadism is unclear. A similar estimated prevalence of female osteoporosis reveals a significantly greater incidence for any age, including those under 70 years old (Table 1). The WHO has compiled data on the prevalence of male and female osteoporosis from different epidemiological studies around the world . Thus, regardless of whether one uses a female or male reference population, the traditional diagnostic category of BMD T-score SD ≤ −2.5 and between ≤1.0 and ≥2.5 is universally used to define osteoporosis and osteopenia in males aged ≥ 50, respectively. Furthermore, the importance of BMD measurements has decreased as emphasis has shifted away from BMD measurements for diagnosis, and more towards the clinically significant fracture risk assessment, of which BMD measurements are only one of many factors that are now considered. For simplicity, it has been advocated by the WHO and others to use the traditional standard female-only reference population. Ideally, in order to capture and acknowledge the differences in the peak BMD reference that occurs between males and females, the male peak BMD reference should be higher than that of females. This updated reference standard has been accepted by a number of international organizations and authorities 3–6, yet many recognize that this Caucasian and female-only reference population is less than ideal for different ethnicities and male gender. After a fracture, 60% of surviving men have a higher chance of suffering a second fracture. It is estimated that 2 million men in the United States currently have osteoporosis. Osteoporosis makes your bones weak and more likely to fracture (break). But they can also lead to loss of bone density. Low testosterone levels can slow prostate cancer growth. Various cancer treatments can increase the risk for osteoporosis. Like other tissues in the body, bone constantly repairs and renews itself. It often isn't diagnosed until after a fracture. Stay on top of latest health news from Harvard Medical School. Benefits include practical tips to keep you healthy and vibrant, up-to-date health news explained simply and clearly, and special promo codes to use for our online courses, special reports, and more. Sign up for HEALTHBeat and receive trusted health information delivered right to your inbox. When you think of testosterone, what comes to mind? When a child or teen develops osteoporosis, the condition is known as juvenile osteoporosis. There are some risk factors that you cannot change, and others that you may be able to change. Osteoporosis occurs when too much bone mass is lost and changes occur in the structure of bone tissue. Osteoporosis is called a "silent" disease" because there are typically no symptoms until a bone is broken. Doctors do not know the cause; however, most children recover without treatment.